<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0,user-scalable=no">
    <title>Document</title>
    <link rel="stylesheet" href="../static/bootstrap-3.4.1/dist/css/bootstrap.css">
    <script src="../static/jQuery-v3.6.0/jQueryv3.6.0.js"></script>
    <script src="../static/bootstrap-3.4.1/dist/js/bootstrap.min.js"></script>
</head>
<style>
    .alert-success{
        background-color:red;
    }
</style>

<body>
    <div class="alert alert-success">成功！很好地完成了提交。</div>
    <div class="alert alert-info">信息！请注意这个信息。</div>
    <div class="alert alert-warning">警告！请不要提交。</div>
    <div class="alert alert-danger">错误！请进行一些更改。</div>
</body>

</html>